﻿package org.hyy.filter;

import java.io.IOException;

import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

/**
 * 对user文件夹的安全性过滤
 * @author Administrator
 *
 */
public class SecurityFilter implements Filter {
	public void doFilter(ServletRequest request,
	        ServletResponse response,
	        FilterChain chain)
	        throws IOException, ServletException {

	    HttpServletRequest req = (HttpServletRequest) request;
	    HttpServletResponse res = (HttpServletResponse) response;

	    HttpSession session = req.getSession();
	    if (session.getAttribute("user") != null) {
	        chain.doFilter(request, response);
	    } else {
	        res.sendRedirect("../err.jsp");
	    }
	}

	public void destroy() {
		// TODO Auto-generated method stub
		
	}

	public void init(FilterConfig filterConfig) throws ServletException {
		// TODO Auto-generated method stub
		
	}

}
